"Sheezus" is a song by British singer-songwriter Lily Allen, released as a promotional single from her third studio album of the same name (2014). It was released alongside its music video on 23 April 2014 ahead of its planned release date of 28 April due to it being leaked. Parlophone later announced that "Sheezus" will not be released as an official single. According to Parlophone, this decision was made because the word 'period' is repeated three times throughout the song.

Allen released her second album, It's Not Me, It's You, in 2009, which saw a genre shift to synthpop, rather than the ska and reggae influences used on her debut album, Alright, Still (2006). In 2009, Allen announced that she would be taking a hiatus from musical activities. The following year, she opened a fashion rental shop named Lucy in Disguise with her sister Sarah, followed by the 2011 launching of her own record label. In 2013, Allen revealed that she had begun working on her third studio album Sheezus. On 20 June 2012, Allen tweeted that she was in the studio working with Greg Kurstin on new music. She changed her professional name from Lily Allen to Lily Rose Cooper. In August 2013 she changed her professional name back to Allen and tweeted new music would be arriving "soon".

Allen initially said that her record label would not allow the release of "Sheezus" as an official single "[because it's] got the word 'period' in it". Allen continued to comment on the matter saying her label wanted to release radio friendly songs such as "Air Balloon", which Allen called "docile pop" and said they were chosen because labels and radio stations "won't play the better stuff". Allen spoke about the single's release during an interview with Rolling Stone magazine, remarking "I would have liked to see [the song] Sheezus as a single, but it's not up-tempo enough. It's also got the word 'period' in it, which is really offensive to people – even though half the world has to deal with it once a month." The song contains references to American singer-songwriters Beyoncé, Katy Perry, and Lady Gaga, as well as Barbadian singer Rihanna, and New Zealander singer-songwriter Lorde.

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